rp2040

commit 62de635eef84f10d862e88771739a678f9c8de71
parent aeaf4505ba3fc32b2d2bad04e468b6e43fd04eba
Author: Matsuda Kenji <info@mtkn.jp>
Date:   Thu, 28 Mar 2024 08:04:17 +0900

hard fault when write to the psp

Diffstat:
M
ex3/main.c
 | 
4
++--
M
ex3/proc.s
 | 
2
+-

2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/ex3/main.c b/ex3/main.c
@@ -52,14 +52,14 @@ main(void) {
 	ptab.tail = &p1;
 
 	p0.id = 0;
-	p0.r[13] = 0x200000e0; // sp
+	p0.r[13] = 0x20000100; // sp
 	p0.r[14] = (unsigned int) halt; // lr
 	p0.r[15] = (unsigned int) proc0 + 1; // pc
 	p0.r[16] = 0;
 	p0.next = &p1;
 
 	p1.id = 1;
-	p1.r[13] = 0x200000e0; // sp
+	p1.r[13] = 0x20000200; // sp
 	p1.r[14] = (unsigned int) halt; // lr
 	p1.r[15] = (unsigned int) proc1 + 1; // pc
 	p1.r[16] = 0;
diff --git a/ex3/proc.s b/ex3/proc.s
@@ -123,7 +123,7 @@ isr_alarm:
 	ldr r1, [r0, #(12 * 4)] // r12
 	str r1, [r2, #0x10]
 	ldr r1, [r0, #(13 * 4)] // psp
-	msr psp, r1
+	//msr psp, r1 // hard fault
 	ldr r1, [r0, #(14 * 4)] // lr
 	str r1, [r2, #0x14]
 	ldr r1, [r0, #(15 * 4)] // ReturnAddress